Robin Getz <[EMAIL PROTECTED]> wrote: > David - I know you have been reworking the noMMU vma handling - is there a > solution to vm_insert_page?
The reason vm_insert_page() is being called, I imagine, is because packet_mmap() has to insert mappings to an already existing buffer. All it does is munge the PTEs in that virtual region to point to the buffer. As long as the buffer is completely contiguous (which I don't know for certain), then this function can be trivially reduced in NOMMU-mode to something that just returns the address of the requested part of the buffer. No remapping would be required. However... If the buffer is *not* completely contiguous, then you can still perform mmaps of it - but only where the desired part _is_ contiguous. Alternatively, you can arrange for the buffer to be completely contiguous upfront. Looking at alloc_pg_vec() in af_packet.c, I will place my bets on the latter case. I don't know that this is a problem; it depends on how things work, and that I don't know offhand. If someone can give me a simple test program, I would be able to evaluate it better. David - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
